feat(admin): add IA shell and protected section skeleton routes

apps/admin/src/app/commissions/page.tsx

@@ -0,0 +1,34 @@
+import { AdminSectionPlaceholder } from "@/components/admin-section-placeholder"
+import { AdminShell } from "@/components/admin-shell"
+import { requirePermissionForRoute } from "@/lib/route-guards"
+
+export const dynamic = "force-dynamic"
+
+export default async function CommissionsManagementPage() {
+  const role = await requirePermissionForRoute({
+    nextPath: "/commissions",
+    permission: "commissions:read",
+    scope: "own",
+  })
+
+  return (
+    <AdminShell
+      role={role}
+      activePath="/commissions"
+      badge="Admin App"
+      title="Commissions"
+      description="Prepare commissions intake and kanban workflow tooling."
+    >
+      <AdminSectionPlaceholder
+        feature="Commissions Workflow"
+        summary="This route is reserved for request intake, ownership assignment, and kanban transitions."
+        requiredPermission="commissions:read (own)"
+        nextSteps={[
+          "Add commissions board with status columns.",
+          "Add assignment, due-date, and notes editing.",
+          "Add transition rules and audit history.",
+        ]}
+      />
+    </AdminShell>
+  )
+}